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Inspection that detects deprecated controller actions referenced in XML routing configurations.
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<p>
    This inspection analyzes route definitions in XML routing files (<code>routes.xml</code>, <code>routing.xml</code>, etc.) and identifies when the referenced
    controller actions (methods or controller classes) have been marked as deprecated.
</p>

<p>
    The inspection checks for:
</p>
<ul>
    <li>Deprecated controller methods or classes using <code>@deprecated</code> or <code>#[Deprecated]</code></li>
    <li>Controller actions that should no longer be used in new code</li>
</ul>

Example XML route configuration:
<pre><code>
&lt;routes&gt;
    &lt;route id="blog_show" path="/blog/{slug}"&gt;
        &lt;default key="_controller"&gt;
            App\Controller\BlogController::show  &lt;!-- Will be highlighted if deprecated --&gt;
        &lt;/default&gt;
    &lt;/route&gt;
&lt;/routes&gt;
</code></pre>


<p>
    If the <code>BlogController::show</code> method or the <code>BlogController</code> class is marked as deprecated,
    this inspection will highlight the route definition and warn about the deprecation.
</p>
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